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4 years ago

A "principal square root" is always...

Mathematics

1 answer:

vladimir1956 [14]4 years ago

3 0

Really none of the above.

A principal square root of a real number is a positive real number (or a positive real number times i, if you're up to complex numbers, but let's assume not.) It's not necessarily a positive integer, √2 being the obvious example.

Is √2 a positive fraction? We can write it as √2 / 1 so I suppose it is. It's certainly not a rational number. Even if we grant irrationals as fractions surely √0=0 isn't a positive fraction. So "always" isn't correct.

I'd go with none of the above, but if I had to choose I'd choose D.

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An investment broker puts 1/12 of his paycheck into a retirement account every quarter? How much of his $84,000 salary is put in

Deffense [45]

Answer:

<u>$7000</u> of his salary is put into his account each quarter.

Step-by-step explanation:

Given:

An investment broker puts 1/12 of his paycheck into a retirement account every quarter.

His salary is $84,000.

Now, to find the amount of his salary put into his account each quarter.

So,to get the amount of his salary:

$\frac{1}{12}\ of\ \$84,000.$

$=\frac{1}{12} \times 84000$

$=\frac{84000}{12}$

$=\$7000.$

Therefore, $7000 of his salary is put into his account each quarter.

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3 years ago

Use the Distributive Property to write an equivalent expression. 20 + 24g A. 4 (5 + 6g) B. 20 (1 + 4g) C. 5 (4 + 6g)

RoseWind [281]

Answer:

Step-by-step explanation:

4(5+6g)

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3 years ago

36 is 12% of what number?

Harman [31]

300

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36 12%
--- = ---
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3 years ago

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Find a ⋅ b. a = <5, 2>, b = <4, 5>

cestrela7 [59]

Answer:

Step-by-step explanation:

For a = <xa, ya> and b = <xb, yb>, the dot product is the sum of products ...

a·b = (xa)(xb) + (ya)(yb)

Substituting the given information, you have ...

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Some graphing calculators can do such math. There are also dot product calculators available on the Internet. If you have quite a few of these to calculate, you can put the appropriate formula into a spreadsheet.

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3 years ago

Can you help me please.

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Answer:

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3 years ago